I stubled across 3 false proofs, see if you can find the errors.
1. X=Y X^2=X*Y X^2-Y^2=X*Y-Y^2 (X+Y)*(X-Y)=Y*(X-Y) X+Y=Y 2Y=Y 2=1
2. X=0.99999... 10X=9.99999... 10X-X=9.99999...-X 9X=9 X=1 0.99999...=1
3. This one is a word problem. Imagine a square with sides of 4, and therefore a perimiter of 16. Cut corners, and the perimiter stays the same Ex.
_____ ___
| | equals _| |_ | | |_ _| |_____| |___|
Repeat to infinity. Square becomes a circle 16=Pi*(2)^2 Therefore, Pi equals 4
That's all folks!
The picture of the example has an error, if you want to see it, then go into edit mode.